R8: Metamorphic rocks and tectonics

[R8P-07] Nature and timing of anatectic event of the Hida Belt (Japan): Constraints from titanite geochemistry and U-Pb age of clinopyroxene-bearing leucogranite

*Hironobu Harada¹, Tatsuki Tsujimori², Yoshiaki Kon³, Shogo Aoki⁴, Kazumasa Aoki⁵ (1. Grad. Sch. of Sci., Tohoku Univ., 2. CNEAS, Tohoku Univ., 3. AIST, 4. Akita Univ., 5. Okayama Univ. Sci.)

Keywords:titanite, leucogranite, U–Pb age, Hida Belt

・Clinopyroxene-bearing leucogranite of the Hida Belt contains coarse-grained titanite.
・The leucogranite occurs associated with amphibolite and marble.
・Titanite containing 'granitic' inclusions yields U–Pb age of 225.4 ± 1.9 Ma.
・Zr-in-titanite thermometry yields a high temperature (>700 °C) crystallization.
・The leucogranite was formed at a later stage of the regional metamorphism of the Hida Belt.